Heaving around a 70-pound kettlebell seemed like a super-swell idea throughout my first round of swings. Unfortunately, I was done with that initial round ONE MINUTE INTO THE WORKOUT. That left 14 full minutes of desperation and regret.

Kyle and I matched each other rep-for-rep during the first couple of three-minute rounds, but by the middle of this workout, I had fallen significantly behind. After a while, I wasn't able to chuck the heavy kettlebell over my head more than a few times before flinging it to the floor and catching my breath.